Lectrosonics UDR195 - Manual (Page 14)

POWER SUPPLY AND FUSE
TROUBLESHOOTING
VU meter lamp and LEDs not lit or dimly lit — When the DR195 is powered from an external DC supply, the VU
meter lamp stays out and the LEDs are dimmed to conserve battery life.
AC power cord disconnected.
External power supply disconnected or inadequate.
Main power supply fuse blown.
For 110 Volt operation: 315 mA, 250 Volt
Buss GDC-315 or Littlefuse 218.315 (Lectrosonics part #22090)
For 220 Volt operation: 160mA, 250 Volt
Buss GDC-160 or Littlefuse 218.160 (Lectrosonics part #22091)
Rear panel voltage selector incorrectly set.
PILOT TONE SQUELCH
The PILOT indicator lamp on the front panel lights up to indicate that the audio has been turned on at the transmitter, and that
the audio output on the receiver is enabled. When the lamp is on, the audio is on. When the lamp is off, the audio is muted.
PILOT lamp on, but no sound
Audio output cable bad or disconnected. Try monitoring at the headphone output on the front panel. The head­
phone output signal is taken just ahead of the output transformer.
AUDIO OUTPUT level set too low.
PILOT lamp off, but sound still comes through
PILOT TONE BYPASS switch may have been pressed. Turn DR195 power off and then back on again to reset the
audio output relays.
PILOT lamp does not come on when transmitter audio switch is turned on
It takes several seconds for the relay to actuate the PILOT lamp. Turn the transmitter power and audio switches on
and wait 5 to 10 seconds for the lamp to come on.
ANTENNAS AND RF SIGNAL STRENGTH
RF LEVEL is weak on one (or both) channels
Antenna is disconnected or there is a bad connection
Antenna may need to be moved or re-oriented
Improper length of antenna, or wrong antenna. UHF whip antennas should be about 5 to 6 inches long. VHF whip
antennas: should be about 14 to 20 inches long.
One OPTI BLEND LED does not come on or is dimly lit
DIVERSITY switch is set to one or the other channels. Needs to be in the center position for normal operation.
Reverse the antennas on the rear panel inputs. If the opposite OPTI BLEND LED now indicates the same problem,
there may be an antenna or cabling problem. Try re-positioning the antenna(s).
14